Home / 21,159.54-31,703.58-12,814.38

Finding the Fourth Proportional to 21,159.54, 31,703.58 and 12,814.38

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Solution

The fourth proportional to 21,159.54, 31,703.58 and 12,814.38 is: 19,199.93

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,159.54 : 31,703.58 = 12,814.38 : x
  2. Step 2: Convert to fraction form
    21,159.54/31,703.58 = 12,814.38/x
  3. Step 3: Cross multiply
    21,159.54x = 31,703.58 × 12,814.38
  4. Step 4: Simplify right side
    21,159.54x = 406,261,721.48
  5. Step 5: Solve for x
    x = 406,261,721.48/21,159.54
  6. Step 6: Final answer
    x = 19,199.93

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.